body { margin: 0; padding: 0; background: #f5f6fa; display: flex; min-height: 100vh; }
.main-wrapper { display: flex; width: 100%; }
.sidebar {
    width: 240px;
    background: linear-gradient(135deg, #4e73df 0%, #224abe 100%);
    padding: 0;
    box-shadow: 2px 0 8px rgba(0,0,0,0.07);
    min-height: 100vh;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}
.sidebar h3 {
    color: #fff;
    font-weight: bold;
    text-align: center;
    padding: 32px 0 16px 0;
    letter-spacing: 2px;
    font-size: 1.3rem;
    margin-bottom: 0;
}
.sidebar ul {
    list-style: none;
    padding: 0 0 32px 0;
    margin: 0;
    flex: 1;
}
.sidebar ul li {
    margin: 0;
}
.sidebar ul li a {
    display: flex;
    align-items: center;
    padding: 14px 32px;
    color: #e3e6f0;
    text-decoration: none;
    font-size: 1.08rem;
    border-left: 4px solid transparent;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
    border-radius: 0 24px 24px 0;
    margin-bottom: 2px;
}
.sidebar ul li a:hover,
.sidebar ul li a.active {
    background: rgba(255,255,255,0.12);
    color: #fff;
    border-left: 4px solid #f6c23e;
    font-weight: bold;
}
.sidebar ul li a .icon {
    margin-right: 10px;
    font-size: 1.2em;
}
.center-content {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}
.center-box {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 40px 60px;
    text-align: center;
    font-size: 1.2rem;
    color: #333;
} 